I've noticed that executing the efun write_socket_gmcp(str1, str2); leads to a server crash. While I'm still getting familiar with GMCP, just the execution of the following is enough to trrigger the DoS:

exec write_socket_gmcp("test", "test");

Results in an immediate crash. The syslog notes the following:

Bad stack after evaluation. Was 37, expected 18446744073708813182, frame ends at 38.
Instruction 263, num arg 0 
Current object was d/Domainname/username/exec_obj
Aborted (core dumped)
Exit status:  134

Not an issue - but it would be nice to have query_port_number (from comm1.c) as an efun.

Hi,

I tried upgrading CD 04.06 to latest version from your git. Unfortunately driver is getting stuck in endless loop in prelang.y, set_label(), line 745 (for loop).
This does not happen at first file (on living files actually, while loading player) and once it happens lpc program memory gets corrupted I guess. Works on our current driver just fine.
Quick debugging session shows that link1 == next == addr all the time and for loop never ends.
Have you encountered this issue? Unfortunately git history starts after there were significant modifications to this file so I cannot track changes that easily (foreach added, try blocks added, some variables changed...)

If not, maybe you could provide some hints what are labels, what is difference between set_label, ins_label, and what is link and address inside label?

Regards,
Garagoth.

Hi,

This is not an issue, just a question. If there's a better place to ask, let me know and I'm happy to do so.

I'm looking to add support for ANSI colors to the driver, but I want to make sure I'm aware of all the places that need to be changed. So far, it looks like I need to update strlen, break_string, and write_socket. Is there any place I'm missing here?

Hi,

I'm looking to add GMCP to my game, but nothing seems to be sent. I'm using Mudlet 3.21.0 as my client, and I do see

Server sent telnet IAC WILL GMCP (201)
WE send telnet IAC DO GMCP (201)
GMCP enabled

when connecting, so it seems like it should work, but any attempt to send
seems to do nothing. I'm using it like write_socket_gmcp("Char.Vitals.hp", 6666);. Am I doing it wrong? This call is valid (i.e. compiles and executes), but nothing is showing up in wireshark. I see this same behavior whether I use exec or do the write from an add_action.

Am I missing a piece of the puzzle here? I'm running the driver on the most recent Ubuntu LTS.

@mindware mentioned this behavior as well, in #5